stockwell



(No Model.)

H. U. STOGKWELL.

TIME LOOK.

No. 280,260. Patented June 26, 1883.

' 'INVENTOR Hrer, Q Woe/swell By his .dttorneys,

UNITED STATES PATENT QrFicE.

HERBERT G. STQOKVVELL, O F STAMFORD, CONNEOTICUT, ASSIGNOR TO THE YALE & TOWNE MANUFACTURING COMPANY, OF SAME PLACE.

TIME-LOCK.

SPECIFICATION forming part of Letters Patent No. 280,260, dated June 26, 1883.

Application filed March 51 1883. (No model.)

charging a charge of dynamite or other quick explosive on the outside of the door to which the lock is applied, in close proximity to the lock. By this methodit is possible sometimes either to break or displace oneof the escapement-wheels of the time mechanism, and thus cause the time mechanism to run down and unlock the lock, or velse to blow the lock off time mechanism caused by such explosions;

and it consists in placing a pin through the back of the'lock, so that it will extend across the intervening space between the lock and the door and abut against the inside of the door, or come very close to it, in such a position that if the pinis driven inward by .an eX- plosion on the outside of the door-such as might break or displace an escapement-wheelits inner end will project inward, so as to hold the locking-dog in the locked position. In conjunction with this safety-pin or stop I also employ another safety device described below.

In the accompanying drawings, Figure l is an elevation of so much of a safe-door looking and bolting mechanism as is necessary to 'time-loc'k mechanism of any ordinary character, and which is applied to a door, so as to leave an intervening space between them, as indicated in Fig. 2.

B indicates the carrying-bar of the bolt-work, of ordinary construction.

0 indicates a dog or obstruction operated by the time-lock mechanism, so as to be held in the path of the bolt-work to prevent its re- ,traction, except at the proper time, when the time mechanism will cause it to drop down out of the way and permit the bolt-workto be retracted.

D indicates a pin which passes through the case and projects across the intervening space 00, and impinges or nearly impinges at one end against the inside of the wall of the door X, as illustrated in Fig. 2. This pin is placed in position below the dog, so that if it is driven in by a force applied against the outside of the safe-door it will project into the path of the dog and prevent its being lowered to permit the retraction of the bolt-work. The pin D may be held in place by friction, or by a slight screw-thread, so that a blow or explosion on the outside of the safe suflicient to del range the time-movements would displace it and drive it inward, so as to prevent the release of the bolt-work. In connection with this unlocking-pin to guard against the derangement and running down of the timelock, I also employ a pivoted spring-bar, E, or equivalent device, as illustrated in Fig. 1,

which, when the'lock-case is in positionupon the door, is held up against the force of its spring F by means of a stud, G, or otherwise, in such position that it is normally idle and forms no obstruction to the retraction of the bolt-work; but in case the look, by an eXplosion of dynamite or the like, should be blown off or started out of its position, so as to be ineffective for locking the pivoted bar or stop v would, by the force of its spring and gravity, drop, so 'as to bring its end in front of a bar or projection, H, attached to the carrying-bar of the bolt-work and prevent its retraction. The stud G may be made very narrow, so that a slight jar will cause the arm to drop. I do not claim the idea of using such a spring-bar in connection with a lock-case to be, broadly, new; but when such a device is used in c011- junction with a pin-projection, as above described, very thorough protection against attacks upon timelocks by the use of dynamite or the like is afforded. Either one or the other or both of these safety devices acting together simultaneously, according to the character of the disturbance created, will interpose automatically, and as a consequence of the explo= sion, to guard the bolt-work. When there is only a slight jar, both the pin and the springarm operate to dog the bolt-works; but when the lock is entirely blown off the spring-arm alone acts.

Having thus described my invention, what I claim to be new, and desire to secure by Letters Patent, is

1. Ihe combination, with alock-case (which, when mounted, stands out from the door or side of the safe or vault, so as to leave an intervening space between them) and the dog of a lock, of a pin or stop projecting from the case, and located so that one end will receive the force of a blow, or of an eXplosionupon the outside of a door, and the other end, when the pin is driven inward, will prevent the movement of the dog for unlocking, substantially as set forth.

2. A safe or vault door provided with boltwork and a time-lock and its case and dog, (the lock being applied so as to leave an intervening space between it and the door,) in combinationwitha pin, D, projecting from the case, and located, substantially as set forth, for preventing the unlocking of the door when the time-lock is interfered with by any unusual jar, and a spring-bar, E, normally sup ported by the time-lock case, and adapted to prevent the unlocking of the door when the time-lock is disturbed or blown entirely off, substantially as and in the manner specified.

In testimony whereof I have hereunto subscribed my name this 10th day of February, A. D. 1883.

HERBERT O. STOCKWELL. Witnesses:

E. STooKwELL, SoHUYLER MERRITT. 

